When it comes to buying the absolute cheapest ticket between the U.S. and Europe, the euphoria of scoring a deal is often tempered by the realization that you've just committed to spending eight hours in thin seats with little legroom. That's been the case for travelers jumping on the famously low fares of Iceland-based Wow Air, but more choice is on the way: The airline just announced a new full-service "premium" ticket; the offering is an enhanced version of the business-class seat that was announced in 2017, according to the airline.

In essence, Wow premium is similar to premium bundles offered on legacy airlines: it includes "a seat with at least 37 inches of legroom; priority boarding and fast- track security; an in-flight meal and drinks; two checked bags; one carry-on item; one personal item; and free-fee flight rescheduling and cancellation protection," the airline reports. The larger chairs are dubbed "Big Seats," but are less business class and more premium economy; still, the leg rest and a guaranteed 37 inches of legroom beats the meager 31 inches in economy on Wow. The Big Seats began showing up on the airline’s Airbus A330 aircraft in summer 2017.

To mark the launch, Wow is offering limited $399 premium tickets to Iceland from Los Angeles, San Francisco, and New York's Newark and JFK airports. Wow is also selling $599 one-way premium bundles to Amsterdam, Paris Charles de Gaulle, and London Gatwick and Stansted from those same U.S. airports. All tickets are for travel from April-June and September-October, 2018, though you'd better book fast if interested: the offer is only available for a limited number of seats and flights, and you have to book a round-trip fare for the deal to be eligible.

In 2016, Wow CEO Skúli Mogensen hinted that 2017 would bring “interesting stuff” and, at the same time, shared his goals for the airline: "My vision is essentially to make travel affordable to everybody. If we can do that, I think we can shrink the world a little bit." With larger, more comfortable seats and premium bundling, Wow’s budget flights may appeal to more fliers, especially business travelers, who initially dismissed the airline as too bare-bones.

Here's a look at Wow's booking levels:

Wow Basic: An economy seat with no pre-selection; a personal item that must fit under the seat in front of you (like a small backpack, pur­se or briefcase) with max­im­um di­mensi­ons of 17 x 13 x10 inches.

Wow Plus: All of the above, plus a carry-on no larger than 22 x 18 x 10 inches and weighing no more than 26 pounds. Also included are cancellation protection and one checked bag up to 44 pounds. Standard seat selection.

Wow Comfy: All of the above, plus priority boarding, a hot meal, and reservation of a XL (seat pitch: 32"-33") or XXL (seat pitch: 35"+) seat.

Wow Premium: A "Big Seat" with at least 37 inches of legroom; priority boarding and fast-track security at Keflavik Airport; an in-flight meal and drinks; two checked bags; one carry-on item; one personal item; and free-fee flight rescheduling and cancellation protection.

Wow’s move to add larger, pricier seats isn’t unique among low-cost carriers; their closest competitor, Norwegian Air, already offers a “Premium Cabin” of five rows of recliner-style seats with 46 inches of legroom onboard their long-haul flights, including routes between the U.S. and Europe. (For reference, the price of these averages 1.75 times that of a non-promotional, normal economy airfare.)

Closer to home, other low-cost carriers have varied their class offerings: select transcontinental and Caribbean JetBlue routes feature the lie-flat “Mint” seats, and on Spirit, ten or fewer “Big Front Seats” with 36 inches of legroom are available for booking on all routes and aircraft. Farther afield, Kuala Lumpur-based AirAsia X has 12 flatbed business class seats in front of 365 regular economy seats on their longest flights between Southeast Asia and Oceania, East Asia, and the Middle East. (AirAsia recently began flying to the U.S., so we may also see more of those seats landing at our airports soon enough.) Budget fliers, rejoice.

This article was originally published on January 31. It has been updated with new information.